Earlier quoted context omitted.
> Do we actually know how many large mining groups we need to make up 51% of the processing power of the block chain Two. GHash.io and BTCguild make up 27% each, for a total of 54%. https://blockchain.info/pools GHash.io had actually been acting maliciously according to some users on Bitcointalk, but the operator claims that was a rogue actor inside that has been dealt with. Double spends against betting sites in par…
We need digital currencies that can only ever be mined efficiently with a CPU, and there need to be many more blocks with lower rewards so that people don't need to join pools if they don't want to. They need to be able to earn "something" (not zero) even with a low-end CPU or when the difficulty gets too great, and close to the point of reaching the maximum number of coins. I think there weren't even 10 percent Bitc…
> I'd rather have that, than a few groups of people or governments owning a ton of ASIC's, or perhaps a few very expensive quantum computers in the future, that they can use to manipulate the currencies.
Any government worth it's salt has server farms with more CPUs and a bigger budget than you can imagine. It's not really a defence at all. Back when it was profitable, the operators at CERN used to mine to keep the cost of their servers down to a minimum, filling the spare cycles between computations. I imagine their systems are nothing compared with that of someone like the NSA.
> I'm not sure how it can be done, but some of the ones that claim to be CPU-only are using multiple hashing algorithms and ciphers at one, presumably to ensure that the task is too complex for anything less "general purpose" than a CPU (at least until they start making chips with accelerators for each and every one of those hashing algorithms?!).
Won't stop them being GPU or FPGA accelerated. I doubt anybody will ever care enough to do a custom silicon chip for any of the "altcoins".